I also have a laptop with Sis630 graphics chipset, it used to work no problem with knoppix, up to 3.3. since later version of 3.3 I get a blank screen if it starts xfree86. after looking at the current boot sequence and the previous boot sequence, it seems it used to detect my 630 graphics card and use the vesa server, now it detects my 630 and tries to use the sis server, which doesnt seem to work on this sis630. so I tried typing knoppix xmodule=vesa at the boot prompt and low and behold all works again. anyone got any ideas why the sis server gives a blank screen on a sis630 chipset? I dont care that much now I've solved it, I may lose some hardware acceleration, but at least I can boot to kde again using knoppix 3.4 10-05-2004